Which size cave is good for an average adult BP

[Rusky]

I don't use hides in my racks anymore, but in my PVC's I had some of the exo-terra hides.

Used the Larges for 600-700 or until they started to left the edges when they were inside.
XL's were the next step, had a 1800g is one with no problems.

RB PVC hides are nice too, all depends if you want more of a natural display look in your tank, tuib, rack or whatever you are using.

By PVC do you mean like pipes?

I don't really care about the "natural look" of my tank, I just want something that works well.

I agree with rebelrachel13 that the Hagen Exo Terra opening looks pretty small even on the large one. So I think at this point the choice is between the exo terra cave hide or the black box ones. Any pros vs cons for either of them?